package filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

public class SpaceFilter implements Filter {

	public void init(FilterConfig filterConfig) throws ServletException {
	}

	public void destroy() {
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		chain.doFilter(new SpaceRequestWrapper((HttpServletRequest) request), response);
	}

	class SpaceRequestWrapper extends HttpServletRequestWrapper {

		public SpaceRequestWrapper(HttpServletRequest servletRequest) {
			super(servletRequest);
		}

		public String getParameter(String name) {
			String result = super.getParameter(name);
			if (result != null) {
				return result.trim();
			}
			return result;
		}

	}

}